1UTMPDUMP(1)                  System Administration                 UTMPDUMP(1)
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NAME

6       utmpdump - dump UTMP and WTMP files in raw format
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SYNOPSIS

9       utmpdump [-frh] [ filename ]
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DESCRIPTION

12       utmpdump is a simple program to dump UTMP and WTMP files in raw format,
13       so they can be examined.  utmpdump eads from stdin unless a filename is
14       passed.
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OPTIONS

17       -f, --follow
18              Output appended data as the file grows.
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20       -r, --reverse
21              Undump,  write  back  edited login information into utmp or wtmp
22              files.
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24       -h, --help
25              Print a help text and exit.
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27       -V, --version
28              Output version information and exit.
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NOTES

31       utmpdump can be useful in cases of corrupted utmp or wtmp entries.   It
32       can  dump  out utmp/wtmp to an ASCII file, then that file can be edited
33       to remove bogus entries and reintegrated, using
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35              utmpdump -r < ascii_file > wtmp
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37       but be warned as utmpdump was written for debugging purpose only.
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BUGS

40       You may not use the option -r as the format  for  the  utmp/wtmp  files
41       strongly  depends  on  the input format.  This tool was not written for
42       normal use but for debugging.
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AUTHOR

45       Michael Krapp
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SEE ALSO

48       last(1), w(1), who(1), utmp(5)
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AVAILABILITY

51       The utmpdump command is part of the util-linux package and is available
52       from  Linux  Kernel Archive ⟨ftp://ftp.kernel.org/pub/linux/utils/util-
53       linux/⟩.
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57util-linux                         July 2012                       UTMPDUMP(1)